Dakota Digital Erratic Temp Gauge - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1bad396ss · 10-04-2018, 11:23 PM

I have the VHX system in my 68 - sensor mounted in pass side head rear port. Put about 200 miles on the truck so far. The gauge seems to act normal now and again. More often than not, it will be right in the 180 range and then peg to the right and back to 180 repeatedly. Wiring is all good. Wondering if this leans towards a bar sensor, not an ideal setup with the adaptor for the 12MM adaptor fitting, or residual air in the system. Nothing leads me to believe anything is getting hot. Fans work fine and respond and desired temp, check radiator temp, not puking any fluid into overflow.

Anyone else have issues with DD temp sensor behavior?

ls1nova71 · 10-05-2018, 02:12 AM

Sounds like there is still some air in the system. Do you have a way of reading what temps the PCM is seeing when this is happening?

**Hart_Rod** · 10-05-2018, 01:18 PM

Check your grounds.

DLW · 10-08-2018, 02:33 PM

I agree with checking the grounds.

I run a DD sensor in the same location, I wish they just used the factory size sensor threads as that adapter they give you pushes the sensor out of the head a ways and is very thin and easy to break with a little toque on it.

That said, mine works fine, put a little heat insulation on the wire since it is close to the exhaust.

**1957 Chief** · 10-10-2018, 01:31 PM

I also am running the VHX with the same setup as you. Never had an issue with it. Like others have said, make sure the motor is grounded good, and make sure the sensor wire isn't laid up on the header.

Also if you can, check your gauge temp reading with your ECT sensor (driver's side front of the head)

Bubba

10-04-2018, 11:23 PM	#1
1bad396ss Registered User Join Date: Jul 2012 Location: STL MO Posts: 85	Dakota Digital Erratic Temp Gauge I have the VHX system in my 68 - sensor mounted in pass side head rear port. Put about 200 miles on the truck so far. The gauge seems to act normal now and again. More often than not, it will be right in the 180 range and then peg to the right and back to 180 repeatedly. Wiring is all good. Wondering if this leans towards a bar sensor, not an ideal setup with the adaptor for the 12MM adaptor fitting, or residual air in the system. Nothing leads me to believe anything is getting hot. Fans work fine and respond and desired temp, check radiator temp, not puking any fluid into overflow. Anyone else have issues with DD temp sensor behavior?

10-05-2018, 02:12 AM	#2
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: Dakota Digital Erratic Temp Gauge Sounds like there is still some air in the system. Do you have a way of reading what temps the PCM is seeing when this is happening? __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

10-05-2018, 01:18 PM	#3
Hart_Rod ************* Join Date: Apr 2005 Location: Pensacola, FL Posts: 17,858	Re: Dakota Digital Erratic Temp Gauge Check your grounds. __________________ Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3

10-08-2018, 02:33 PM	#4
DLW Registered User Join Date: Apr 2014 Location: Union City, CA Posts: 384	Re: Dakota Digital Erratic Temp Gauge I agree with checking the grounds. I run a DD sensor in the same location, I wish they just used the factory size sensor threads as that adapter they give you pushes the sensor out of the head a ways and is very thin and easy to break with a little toque on it. That said, mine works fine, put a little heat insulation on the wire since it is close to the exhaust.

10-10-2018, 01:31 PM	#5
1957 Chief Senior Member Join Date: Jun 2016 Location: Beebe, AR Posts: 462	Re: Dakota Digital Erratic Temp Gauge I also am running the VHX with the same setup as you. Never had an issue with it. Like others have said, make sure the motor is grounded good, and make sure the sensor wire isn't laid up on the header. Also if you can, check your gauge temp reading with your ECT sensor (driver's side front of the head) Bubba

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